Archive for the ‘microcontroller’ tag

Single Chip MicroController

SCM is a major piece of computer components are integrated into the
chip micro-computer. It is a multi-interface and counting on the
micro-controller integration, and intelligence products are widely < br /> used in industrial automation. and MCS-51 microcontroller is a
typical and representative.
The topics chosen for the 89S51 control of the core components used
in the design of a daily electronic music doorbell system. When the
function button is pressed, the music sounded and the music beats
with light emitting diodes for flickered. Initial corresponding LED
timer. Musical process again pressed the button ineffective, and
only when pressed again before the end of the music effectively. If
the doorbell ring for electronic music, press the button on the
reduction and termination, showed initial state. Practice has
proved that the system is stable and has some practical value.

Very simple PIC programmer (programmer), PIC Microcontroller Programmer

very simple PIC programmer (programmer), PIC
Microcontroller Programmer
Keywords: PIC microcontroller , writer and programmer
Author: Qin Crescent
PIC microcontrollers in performance and price, in the present world is far ahead of the microcontroller . For example, it has with the AD converter, the drive current is large direct drive digital control, etc., but many of our learners has been burning for its high prices discourage and emulators. Recently some of the information on the Internet to search through the experiments and found that with a few common components and simple circuits can be barricaded PIC microcontroller programmer, and the software is free, can be directly downloaded to the network, as long as there is interest in this almost no investment in the field can enter the PIC microcontroller, learn PIC microcontroller, to perform its functions and benefits.
one, PIC programmer making
we can connect the circuit in Figure 1, do not provide power for this circuit, the power provided directly by the 9-pin serial port. When even the good, the connected to the microcontroller has five lines, can support PIC12C5XX, 12C67X, 24CXX, 16C55X, 16C62X, 16C71, 16C71X, 16C8X, 16F8X series of microcontrollers, as long as VCC, GND, MCLR / VPP, RB7/PGD, OSC1, RB6/PGC connected to your PIC microcontroller to be programmed, such as the PIC16F870 microcontroller on the corresponding pin on the microcontroller can be programmed, (VCC corresponding to the single-chip 20 feet
, GND corresponds to the single-chip 8-feet and 19 feet, MCLR / VPP corresponding MCU pin 1, RB7/PGD corresponding to the MCU 28 feet,
OSC1 corresponding to the microcontroller 9 feet, RB6/PGC corresponding to the microcontroller 27 feet). 16F870 microcontroller pins shown in Figure 2 (omitted). If Amoy cheap components, the total cost of less than 5 dollars. If the cat or the old serial mouse split some of the components inside, then make it almost would not have to spend money.
programming software can use IC-PROG and PonyProg2000. Recommend the use of IC-PROG, because it both supports the device is programmed into the speed and stability are better than PonyProg2000
, but was the first company to use the MPLAB PIC source code will compile the data into hex and then this SCM software written two years.

Note: This programmer is used with the computer 9-pin serial port connection, and if not, you can use 25-pin serial port, but of course requires some wiring changes, as follows:
25 pin to 9 pin serial port, followed by two pairs of 3,7 of 5,5 of 4,4 of 7 of 8, 20.
two steps
production after the success of the steps, mainly the following steps:
(1) compile the source code with the MPLAB
(2) compilation is successful
(3) to connect to a computer programmer made, connect the programmer of the five lines to the corresponding microcontroller pin
(4) open burning software, select to burn the chip model,
(5) Open MPLAB compiled hex or binary files.
(6) in the burning software, select write chip
(7) to write successfully, run the program
In short, it that simple burner can be completed a few hundred dollars to do, However, this disadvantage is that the programmer wrote the film a little slow, but also to further improve the electronic enthusiasts please reference website http://www.jdm.homepage.dk may increase the recording speed.